The 2UUL DA28 FlatCut Solder Pad Underfill Glue Fast Removal Blades are ultra-thin, premium-tier micro-scraping blades engineered specifically for advanced smartphone motherboard re-work and chip-level component preparation. Sold in a convenient 5-piece bench pack, these specialized blades feature a completely flat, razor-sharp edge profile optimized to glide seamlessly across sensitive BGA contact fields.
During heavy repairs—such as an iPhone CPU transplant, RAM sandwich separation, or baseband IC swap—manufacturers shield components with hardened epoxy resins. The 2UUL DA28 provides the micro-mechanical accuracy required to cleanly shave away this stubborn black factory underfill and residual solder without scratching the underlying PCB laminate or lifting delicate copper trace pads.
Key Structural Features & Bench Advantages:
- Flush-Cut Flat Geometry: Unlike standard curved or pointed hobbyist blades that dig into surfaces at an angle, the proprietary flat-edge design sits completely flush against the circuit board to lift glue uniformly.
- Trace-Safe Flexible Thickness: Engineered from high-tensile, flexible micro-alloy steel that absorbs uneven hand pressure, significantly reducing the risk of gouging mask layers or destroying trace rails.
- High-Efficiency Heat Resistance: Designed to be used concurrently with hot air stations. The blades easily slide under heated, softened underfill glue without warping or losing their razor-sharp integrity.
- Universal Handle Compatibility: The shank configuration is designed to fit standard micro-handpieces, allowing technicians to quickly lock them into existing universal blade holders on their bench.
Technical Specification Matrix
Parameter Profile | Component Specification Details |
Brand / Model | 2UUL Original (DA28 FlatCut Edition) |
Package Configuration | 5 Pieces Per Secure Storage Box |
Blade Profile Type | Straight Flat-Edge Micro Scraper |
Primary Material | High-Grade Flexible Micro-Alloy Carbon Steel |
Thickness Metric | Ultra-Thin Micron Scaling for High-Density Layouts |
Target Adhesive Profiles | Black Underfill Epoxy, UV Glue, Secondary Shielding Resins |
Primary Workshop Utility | BGA Solder Pad Scraping, IC Border Glue Cleansing, PCB Prep |
Recommended Bench Operation Guide:
- Pre-Heating the Frame: Secure the smartphone logic board into a high-quality magnetic PCB fixture under your microscope. Set your hot air gun to approximately 180°C to 220°C with moderate airflow to safely soften the factory underfill resin around the perimeter of the target IC.
- Executing the Flat-Cut Scraping: Hold the 2UUL DA28 blade at a shallow, low angle relative to the motherboard. Guide the flat edge smoothly across the board surface, letting the blade slide beneath the softened adhesive. Shave the resin away in controlled, single-direction strokes rather than sawing back and forth.
- Cleaning the BGA Pads: Once the IC chip is removed, use the flat profile of the DA28 to skim off the remaining irregular bumps of old solder paste and residual underfill left behind on the pad array.
- Final Wash Finish: Finish the bench prep by applying a small amount of low-temperature flux, lightly running a desoldering wick over the array, and brushing the logic board clean with pure isopropyl alcohol (IPA). Your surface is now perfectly flat and prepped for a clean reball alignment.
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